a bit of a clusterfuck: when allies spy on each other

Q: Do other countries spy like this on the United States?

A: They do, but most don't have the U.S. technology or financial resources -- $10.8 billion for fiscal 2013, according to a budget document Snowden leaked. The NSA is rivaled only by Britain's code-breaking Government Communications Headquarters or GCHQ, an agency the U.S. works with closely, according to the Snowden documents. U.S. ally Israel is considered one of the top counterintelligence threats. U.S. spies and diplomats who work in Israel expect to have phone calls intercepted, and their intelligence work disrupted. Israeli security services are even suspected of breaking into the homes of the successive CIA station chiefs and tampering with sensitive equipment.___

http://m.washingtonpost.com/politics/federal_government/why-spy-on-friends-a-qanda-explaining-why-nsa-might-listen-in-on-a-foreign-leaders-calls/2013/10/24/2596d972-3ce0-11e3-b0e7-716179a2c2c7_story.html